/// <summary>
/// Stops the context. Note: You can only call this method once per Context.
/// </summary>
public void Stop()
{
AssertState(ContextState.Started);
lock (_contextMutex)
{
AssertState(ContextState.Started);
State = ContextState.Stopping;
foreach (KeyValuePair <string, object> kvp in singletonsByName)
{
ComponentDescriptor descriptor = null;
if (descriptorNameCache.TryGetValue(kvp.Key, out descriptor))
{
foreach (IComponentLifecycleProcessor componentLifecycleProcessor in componentLifecycleProcessors)
{
componentLifecycleProcessor.OnStop(this, kvp.Value, descriptor);
}
}
}
singletonsByName.Clear();
singletonsByType.Clear();
descriptorTypeCache.Clear();
descriptorNameCache.Clear();
State = ContextState.Stopping;
}
}
/// <summary>
/// Resolves an injection to a Component.
/// </summary>
/// <param name="context"></param>
/// <param name="componentDescriptor"></param>
/// <param name="injectDescriptor"></param>
/// <returns></returns>
public object ResolveInject(Context context, ComponentDescriptor componentDescriptor, InjectDescriptor injectDescriptor)
{
ComponentDescriptor injectComponent = null;
if (injectDescriptor.Attributes.Name != null)
{
context.descriptorNameCache.TryGetValue(injectDescriptor.Attributes.Name, out injectComponent);
}
if (injectDescriptor.Attributes.Type != null)
{
if (injectComponent == null)
{
context.descriptorTypeCache.TryGetValue(injectDescriptor.Attributes.Type.AssemblyQualifiedName, out injectComponent);
}
else
{
if (injectComponent.Type != injectDescriptor.Attributes.Type)
{
injectComponent = null;
}
}
}
else
{
context.descriptorTypeCache.TryGetValue(injectDescriptor.Type.AssemblyQualifiedName, out injectComponent);
}
return injectComponent == null ? null : context.GetInstance(injectComponent);
}
/// <summary>
/// Resolves an injection to a Component.
/// </summary>
/// <param name="context"></param>
/// <param name="componentDescriptor"></param>
/// <param name="injectDescriptor"></param>
/// <returns></returns>
public object ResolveInject(Context context, ComponentDescriptor componentDescriptor, InjectDescriptor injectDescriptor)
{
ComponentDescriptor injectComponent = null;
if (injectDescriptor.Attributes.Name != null)
{
context.descriptorNameCache.TryGetValue(injectDescriptor.Attributes.Name, out injectComponent);
}
if (injectDescriptor.Attributes.Type != null)
{
if (injectComponent == null)
{
context.descriptorTypeCache.TryGetValue(injectDescriptor.Attributes.Type.AssemblyQualifiedName, out injectComponent);
}
else
{
if (injectComponent.Type != injectDescriptor.Attributes.Type)
{
injectComponent = null;
}
}
}
else
{
context.descriptorTypeCache.TryGetValue(injectDescriptor.Type.AssemblyQualifiedName, out injectComponent);
}
return(injectComponent == null ? null : context.GetInstance(injectComponent));
}
/// <summary>
/// Resolves Context injections.
/// </summary>
/// <param name="context"></param>
/// <param name="componentDescriptor"></param>
/// <param name="injectDescriptor"></param>
/// <returns></returns>
public object ResolveInject(Context context, ComponentDescriptor componentDescriptor, InjectDescriptor injectDescriptor)
{
if (injectDescriptor.Type.Equals(context.GetType().AssemblyQualifiedName))
{
return context;
}
return null;
}
/// <summary>
/// Resolves Context injections.
/// </summary>
/// <param name="context"></param>
/// <param name="componentDescriptor"></param>
/// <param name="injectDescriptor"></param>
/// <returns></returns>
public object ResolveInject(Context context, ComponentDescriptor componentDescriptor, InjectDescriptor injectDescriptor)
{
if (injectDescriptor.Type.Equals(context.GetType().AssemblyQualifiedName))
{
return(context);
}
return(null);
}
/// <summary>
/// Notifies the given component when the Context stops.
/// </summary>
/// <param name="context"></param>
/// <param name="component"></param>
/// <param name="descriptor"></param>
public void OnStop(Context context, object component, ComponentDescriptor descriptor)
{
foreach (MemberInfo member in descriptor.Type.GetMembers(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance))
{
if (member is MethodInfo)
{
if (member.GetCustomAttribute <OnStopAttribute>() != null)
{
((MethodInfo)member).Invoke(component, new object[0]);
}
}
}
}
/// <summary>
/// Notifies the given component when the Context stops.
/// </summary>
/// <param name="context"></param>
/// <param name="component"></param>
/// <param name="descriptor"></param>
public void OnStop(Context context, object component, ComponentDescriptor descriptor)
{
foreach (MemberInfo member in descriptor.Type.GetMembers(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance))
{
if (member is MethodInfo)
{
if (member.GetCustomAttribute<OnStopAttribute>() != null)
{
((MethodInfo)member).Invoke(component, new object[0]);
}
}
}
}
/// <summary>
/// Registers a components of the given type and attributes.
/// </summary>
/// <param name="type"></param>
/// <param name="componentAttribute"></param>
private void RegisterComponent(Type type, ComponentAttribute componentAttribute)
{
lock (_contextMutex)
{
AssertState(ContextState.Created);
if (componentAttribute.Name == null)
{
componentAttribute.Name = type.Name;
}
ComponentDescriptor existingDescriptor = null;
if (descriptorNameCache.TryGetValue(componentAttribute.Name, out existingDescriptor))
{
ComponentDescriptor descriptor = descriptorNameCache[componentAttribute.Name];
if (!existingDescriptor.Type.AssemblyQualifiedName.Equals(type.AssemblyQualifiedName))
{
throw new ComponentNameException("Component name '" + componentAttribute.Name + "' is already used by '" + descriptor.Type + "'");
}
else
{
return;
}
}
string typeName = type.AssemblyQualifiedName;
if (descriptorTypeCache.ContainsKey(typeName))
{
return;
}
ComponentDescriptor componentDescriptor = new ComponentDescriptor(type, componentAttribute);
descriptorTypeCache[typeName] = componentDescriptor;
descriptorNameCache[componentAttribute.Name] = componentDescriptor;
}
}
/// <summary>
/// Creates an instance of a component and caches if it is of Singletone scope.
/// </summary>
/// <param name="component"></param>
/// <returns></returns>
internal object GetInstance(ComponentDescriptor component)
{
object response = null;
if (!singletonsByName.TryGetValue(component.Attributes.Name, out response))
{
response = Activator.CreateInstance(component.Type);
if (component.Attributes.Scope == ComponentScope.Context)
{
singletonsByName[component.Attributes.Name] = response;
Type currentType = component.Type;
while (currentType != null)
{
HashSet <object> singletonTypes = null;
if (!singletonsByType.TryGetValue(currentType.AssemblyQualifiedName, out singletonTypes))
{
singletonTypes = new HashSet <object>();
singletonsByType[currentType.AssemblyQualifiedName] = singletonTypes;
}
singletonTypes.Add(response);
currentType = currentType.BaseType;
}
}
foreach (InjectDescriptor inject in component.Injections)
{
object injectionValue = null;
foreach (IInjectionProvider injectionProvider in injectionProviders)
{
injectionValue = injectionProvider.ResolveInject(this, component, inject);
if (injectionValue != null)
{
break;
}
}
if (injectionValue == null)
{
throw new ComponentNotFoundException(inject.Attributes.Type, inject.Attributes.Name);
}
if (inject.Member is FieldInfo)
{
((FieldInfo)inject.Member).SetValue(response, injectionValue);
}
else if (inject.Member is PropertyInfo)
{
((PropertyInfo)inject.Member).SetValue(response, injectionValue);
}
}
foreach (IComponentLifecycleProcessor componentLifecycleProcessor in componentLifecycleProcessors)
{
componentLifecycleProcessor.OnStart(this, response, component);
}
}
return(response);
}
